Build a Google Sheets–Based Automated Debt Collection Email System

I’m looking for an experienced automation developer to build a system that streamlines part of our debt collection workflow. The system should use Google Sheets as its data source. The sheet contains contact records — names, email addresses, and payment/overdue details for clients who are late on payments. Based on this data, the system needs to: - Read client records automatically from the Google Sheet - Send follow-up emails on a recurring schedule (every 2 days) to the relevant contacts - Use pre-set email templates that are automatically personalized with each client's data (name, amount, due date, and other fields from the sheet) - Track which emails have been sent and when, so the timing stays consistent per contact - Stop or pause sending for a given contact when their status changes (e.g., marked as paid) Additional features will be discussed in a call — there are further requirements beyond the core email automation described above.